Heater



A. WILSON May 13, 1930.

HEATER Filed June 14', 1928 Cit Patented May 13, 1930 UNITED STATESPATENT OFFICE ALBERT WILSON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TOPITTSBURGH ROLLS CORPORATION, OF PITTSBURGH, PENNSYLVANIA, A CORPORATIONOF PENNSYL- VAN IA HEATER Application filed June 14,

My invention consists of an improvement in heaters for oil or otherfluids for use as fuel in the form of a spray, by means of waste heat.It has for its object to provide a simple, cheap and effective means forabstracting the waste heat through a tortuous path of circulationthrough one or more chambers, to gether with certain features ofconstruction, as shall be more fully hereinafter described.

Referring to the drawings showing one preferred embodiment of theinvention:

Fig. 1 is a plan view of the heater;

Fig. 2 is a view in side elevation, partly in section, on the line II1Iof Fig. 1;

Fig. 3 is a detail sectional view on the line IIIIII of Fig.

For the purpose of providing a closed cir culating chamber for Waste orother heat I utilize one or more cylindrical vessels 2, of largediameter pipe or the like, having closing ends 3 and 4. These aretightly connected by rods or bolts 5 with intervening packing materialto flanged heads mounted on the ends of vessels 2 and preferably havinginwardly extending flanges (i as of angle iron, as shown.

An inlet connection 7 for gases. etc., from any source of waste heat, asa furnace, leads through one side of the tank near its bottom, and asimilar connection 8 leads outwardly from the opposite side near thetop, for circulation of heating gases. \Vhere two or more such tanks orchambers are used, as shown, the connection 8 may join the tanks, and anoutlet connection 5) is correspondingly located at the opposite lowerside of the other tank. A pump or exhauster 10 is connected with theoutlet conduit for etiecting suction and induced circulation through themachine.

Oil or other fluid to be heated is introduced by a. pipe 11 through astutiing-box connection 12 with bottom 4 to the interior.

The pipe 11 is formed into a coil 13 within the chamber throughout itslength as shown, and the pipe leads through connection 8 to the upperend of the second chamber, where it continues by a similar coil 14 tothe bottom. The pipe finally extends through stuffing-box connection 15,by its outlet terminal to any suitable point of discharge. The heatedoil under proper pressure becomes atom- 1928. Serial No. 285,299.

ized as it is discharged from the terminal nozzle or other burnerelement of delivery pipe 16 in the form of a fine spray, best adaptedfor combustion in any suitable furnace or chamber, for heating asdesired.

For the purpose of bringing the hot gases into intimate contact with thecirculating coil or coils I provide a series of alternating baflieplates 17 arranged within the chamber as shown in Fig. These platesextend inwardly between adjacent coils, closing the cross area at oneside and leaving a comparatively restricted circulating space 18 at theopposite free edge of the battle.

By locating such bafiie in alternating arrangement, the hot gases passthrough the chamber in an alternating path and with a. certain degree ofretardation, effecting complete contact with the coil and abstraction byits contents of the heat from the hot gas, to a comparatively completedegree. Thus, with hot gas entering the chamber at a temperature of say350 -600 F., oil in the coil will be. raised to a temperature of say 180F. with a proportionate reduction in the temperature of the hot gas.

ll'here a pair of chambers and a pair of coils are utilized as in thedrawing, the coils may be easily made in two sections joined by a flangeor other suitable connection 19, pret erably at one side or the other ofthe circulating conduit 8. to avoid undue throttling tberethrough. Thebaflles 17 as shown are arranged across the main area of the chamber ortank and at an inclination generally conforming to the sloping spacebetween the spi ral coils, so as to leave ample intervening space bysuch convenient arrangement.

in ope ation. the flow of the hot gases is induced by the action of thepump 10 at a speed and degree of suction, dependent on the power of thepump. its speed of operation, etc. The oil to be heated is passedthrough the coil or coils, and due to the construction provided and theclose, intimate and continuous contact with the heating element, as hotgases, passes outwardly through the delivery section 16 at a relativelymuch higher temperature. The degree of heat may be readily regulated bycontrol valves, either in the oil circulating line or in the incoming oroutgoing conduits T or 9, for the hot gases, whereby to quite definitelycontrol and regulate the operation.

It will be understood that the particular design, dimensions,arrangement of parts and other details of construction may be variouslychanged or modified by the skilled mechanic in adapting the invention toany particular installation or adaptation, but that all such changes areto be understood as within the scope of the following claim.

Vhat I claim is:

In combination, a pair of casings for hot gas circulation having at oneend a hot gas inlet opening and a hot gas outlet opening respectively, aconduit connecting adjacent end portions of the casings, a fuelcirculating coil in each casing having a connection extending throughsaid conduit and provided with oppositely located inlet and outletconnections respectively extending through the casing, a series ofalternating battle plates in each casing extending inwardly fromopposite Walls thereof partly across and between adjacent coils of thefuel circulating coils in alternating sloping arrangement providingalternating hot gas passages, and a pump connected with the hot gasoutlet opening.

In testimony whereof I hereunto aflix my signature.

ALBERT WILSON.

